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Post by phoenix1967 on Mar 8, 2009 20:35:30 GMT -5
Last year sometime, a good friend (the one smokin a war pipe with me) Brought me a coal forge from the museum he was working at that was headed for the scrap heap. The clinker bereaker was missing, as was the ash dump, and the hand crank blower was seized up. Today, I started rebuilding the blower. the bolts were rusted into 4 or five sided globs, and everything was rust welded together. I polled the fan shaft out (remnants of anchient bearings everywhere) The shaft is rusted almost through, and at some point in it's history, someone had brazed the fan to the shaft. Nothing for it but to replace the shaft first we select a shaft (52100 bearing steel) and mark the positions of the bearing and gear now we cut the important bits off the shaft of course now we have to drill out the old shaft so center punch drill with a small bit finish with a big bit and cut off the rest of the shaft (my replacement shaft is smaller diameter than the original) Thread the end of the shaft for keeper nut Now drill the old shaft outta the fan drill and tap a set screw hole in the fan hub (I used 1/4 x 20) I looked throughout my scrap heap, and found no bearings of the appropriate size, so I settled on bushings. I had some self lubricating nylon bushing material, so I cut some pucks out with frankensaw, and chucked 'em up in frankenlathe well, it's getting dark, and wifey's wonerin if one of my machines ate me, so I'll finish up tomorrow....
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Post by phoenix1967 on Mar 12, 2009 14:30:06 GMT -5
Well I got back to working on the blower today, but first I had to fix the hoses on my OA welder before I got to it. Seems My idiot dogs thought the hose was tasty... I needed to clean the teeth up (they got pretty ugly in the removal from the original shaft. I drilled through gear and shaft, and installed a 5/32 bronze shear pin to keep the gear located on the shaft. Not shown was me HT'ing the gear afterwards (oil quenched) I used the OA torch to heat it. one of the large gears has a chip in the teeth, but it still works after freeing up the gears, I used ny drill to lap them in and smooth things out. now we bolt on the back half of the shroud... Now the fan blade The front half and a new coat of paint The final result... The chunk outta the gear makes it a littleclunky, but she works. Tomorrow I'll start hooking everything up to the old forge, and cleaning it up. I still need to make a clinker breaker and an ash dump valve for the old forge.
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